Generac Power Systems 004988-4 Benutzerhandbuch

 

 

9

• 

NFPA No. 37, STATIONARY COMBUSTION 

ENGINES AND GAS TURBINES.

• 

NFPA No. 76A, ESSENTIAL ELECTRICAL 

SYSTEMS FOR HEALTH CARE FACILITIES.

•  NFPA No. 220, STANDARD TYPES OF BUILDING 

CONSTRUCTION

•  NFPA No. 68, GUIDE FOR EXPLOSION VENTING
•  NFPA No. 70, NATIONAL ELECTRICAL CODE.
• NFPA No. 30, FLAMMABLE AND COMBUSTIBLE 

LIQUIDS CODE.

•  NFPA No. 10, INSTALLATION, MAINTENANCE AND 

USE OF PORTABLE FIRE EXTINGUISHERS.

In addition to NFPA standards, the following informa-
tion pertaining to the installation and use of standby 
electric systems is available:

NOTE:

It is essential to use the latest version of any stan-
dard to ensure correct and current information.

• Article X, NATIONAL BUILDING CODE, available 

from the American Insurance Association, 85 John 
Street, New York, N.Y. 10038.

•  AGRICULTURAL WIRING HANDBOOK, obtainable 

from the Food and Energy Council, 909 University 
Avenue, Columbia, MO, 65201.

• 

ASAE EP-364.2, INSTALLATION AND 

MAINTENANCE OF FARM STANDBY ELECTRIC 
POWER, available from the American Society 
of Agricultural Engineers, 2950 Niles Road, St. 
Joseph, MI 49085.

• 

A52.1, AMERICAN NATIONAL STANDARD 

FOR CHIMNEYS, FIREPLACES AND VENTING 
SYSTEMS, available from the American National 
Standard Institute, 1430 Broadway, New York, N.Y. 
10018.

Install the generator set, in its protective enclosure 
outdoors, where adequate cooling and ventilating air 
always is available. Consider these factors:

• Install the unit where air inlet and outlet open-

ings will not become obstructed by leaves, grass, 
snow, etc. If prevailing winds will cause blowing or 
drifting, consider using a windbreak to protect the 
unit.

• Install the generator on high ground where water 

levels will not rise and endanger it.

• This genset must be installed on a level surface. 

The base frame must be level within 1/2 inch all 
around.

•  Allow sufficient room on all sides of the generator 

for maintenance and servicing. A good rule is to 
allow five feet of space on all sides.

‹

• Where strong prevailing winds blow from one 

direction, face the generator air inlet openings into 
the prevailing winds.

• Install the generator as close as possible to the 

transfer switch. This reduces the length of wiring 
and conduit.

• Install the generator as close as possible to 

the fuel supply, to reduce the length of piping. 
HOWEVER, REMEMBER THAT LAWS OR CODES 
MAY REGULATE THE DISTANCE.

Retain the generator compartment to a concrete slab 
with 1/4-inch masonry type anchor bolts. Be sure the 
bolts are long enough to retain the compartment. The 
slab should be at least six inches thick and should 
extend beyond the enclosure to a distance of at least 
three inches on all sides. See Section 6 for generator 
major dimensions.

Figure 2.1 shows a schematic diagram of a basic 
standby electric system. Both the UTILITY power 
supply and the STANDBY (GENERATOR) output are 
connected to an approved transfer switch. The trans-
fer switch is required by electrical code and serves 
the following functions:

• Allows the LOAD circuits to be connected to only 

one power supply at a time.

•  Prevents electrical backfeed between the generator 

and the UTILITY power circuits.

Notice that both the STANDBY and the UTILITY 
power supplies to the transfer switch are protected 
against overload by a main line circuit breaker.